From 28ca343b4347797019ac30a8c51df61cfb994915 Mon Sep 17 00:00:00 2001
From: Syntriax <syntriax@gmail.com>
Date: Fri, 10 Oct 2025 14:21:54 +0300
Subject: [PATCH] perf: improved pool return method by using a hashset for
 searching if the returning item is already queued

---
 Engine.Core/Helpers/Pool.cs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Engine.Core/Helpers/Pool.cs b/Engine.Core/Helpers/Pool.cs
index 980823f..a5cfc9a 100644
--- a/Engine.Core/Helpers/Pool.cs
+++ b/Engine.Core/Helpers/Pool.cs
@@ -10,22 +10,25 @@ public class Pool<T> : IPool<T>
 
     private readonly Func<T> generator = null!;
     private readonly Queue<T> queue = new();
+    private readonly HashSet<T> queuedHashes = [];
 
     public T Get()
     {
         if (!queue.TryDequeue(out T? result))
             result = generator();
 
+        queuedHashes.Remove(result);
         OnRemoved?.Invoke(this, result);
         return result;
     }
 
     public void Return(T item)
     {
-        if (queue.Contains(item))
+        if (queuedHashes.Contains(item))
             return;
 
         queue.Enqueue(item);
+        queuedHashes.Add(item);
         OnReturned?.Invoke(this, item);
     }